Boiler



July 19, 1932. Q W. BRABBE 1,868,445

BOILER Filed Aug. 16. 1927 8 Sheets-Sheet l July' 19, l1932. C. W BRABBEE 1,868,445

BOILER Filed Aug. 16, 1927 8 Sheets-Sheet 2 WATER WATER LINE LINE BY WW TTORNEY. A

July 19, 1932. C, W` BRABBEE 1,868,445

BOILER Filed Aug. 16, 1927 8 Sheets-Sheet 3 July 19, 1932. c. w. BRABBEE BOILER Filed Aug. 16. 1927 8 Sheets-Sheet 4 Uu MMM INVENTOR.

July 19, 1932. c. w. BRABBEE BOILER Filed Aug. 16. 1927 8 Sheets-Sheet 5 l/ BY @ATTORNEY m Qu July 19, '1932. c. w. BRABBEE BOILER Filed Aug. 16. 1927 8 Sheets-Sheet 6 A TTORNEY July 19, 1932. c. w, BRABBE BOILER Filed Aug. 16, 1927 8 Sheets-Sheet 7 IN VEN TOR.

/JATTOR EY.

July 19, 1932.. c. w. BRABBEE BOILER Filed Aug. 16, 192'?" 8 Sheets sheet 8 if@ Q @g3/Q "'NVEToR, Mama/4 Z0, @we

LA TToR Ey Patented July 19, 1932 UNITED lSTATES PML-:Nr OFFICE CHAREQ XV; BRABBE, F BRONXVILLE, NEW YORK, ASSIGNOR- TO AMERICAN RADI- ATOR COMPANY, OF NEW YORK, N. Y., CORPORATON 0F NEW JERSEY BOILER Application filed August 16, 1927. Serial No. 213,231.

My invention relates broadly and generally to new and useful improvements in boilers, and more particularly of the low pressure type such as are employed for heating water,

or for kgenerating low pressure steam for circulation in a heating system including one or more heat-emitting elements commonly designated radiators.

Among other objects to be more fully set 1G forth hereinafter; the invention contemplates the provision of a` sectional boiler which will burn efficiently a variety of fuels, inclusive of both hard and soft coal, and in which the combustion of the fuel will beattended with a minimum emission of smoke. A further objectis to provide a boiler in which the heat of combustion will be efficiently and economically transmitted to the water-containing space or spaces, and consequently have a relatively high heat output in a heating system.

The invention consist in the improved construction and combination of parts and elements, to be more fully described hereinafter, and the novelty of which will be particularly pointed out and distinctly claimed.

In the accompanying drawings to be taken as a part of this specification, I have illustrated a preferred embodiment of my invention, and in whichV drawings- Figure 1 is a view in front elevation with part of the jacket or covering removed to show certain parts of the boiler proper;

Fig. 2 is a view in side yelevation looking at the left-hand side of Figzl; y

Fig. 3 is a view inside elevation looking at the right-hand side of Fig. 1;

Fig. 4 is a view in front end elevation of a portion of one of the center or intermediate sections of 'the boiler; o Fig. 5 is a view in side elevation of that Vportion of the section shown in Fig. 4;

Fig. 6 is a view in front elevation of aportion of two of the parts shown in Fig. 4 and showinga yclosure-plate applied thereto forV closing the front endl of a flue pass between two of the center or intermediate sections; Fig. '4' is a vertical central section through the closure-plate shown in Fig. 6; y k Fig. 8 is a view in side elevation of an end D@ wall or section., the configuration of parts on the inner surface thereof being indicated in dotted lines;

Fig. 9 is an enlarged detail view of the upper left-hand corner portion of Fig. 8,;

Fig. l() is a section on the line 104-10 of Fig. 9;

Fig. 11 is a View on a vertical intermediate section line through Fig. 1, showing one of the intermediate boiler sections in side elevation;

Fig. 12 is a View in side elevation showing the inner face of one of the end sections vand showing in full lines the conguration of parts shown in dotted lines in Fig. 8;

Fig. 13 is a view in front elevation or edge View of the end section shown in Fig. 12;

Fig. 14 is a view in rear end or edge elevation of the section shown in Fig. 12;

Fig. 15 is a section View on the line 15-15 of Fig. 11 through one of the center or intermediate sections;

Fig. 16 is a section onthe line 16-16 of Fig. 11; v

Fig. 17 is a section on the line 17-,17 of Fig. 11;

Fig. 18 is a section on the line 18e-18 Aof Fig. 11;

Fig. 19 is an enlarged View in front elevation, partly in section, of a front wall or section containing the fuel feed port openings and clinker door openings;

Fig. 20 is a section on the line 20e-20 of Fig. 19;

Fig. 21 is a section on'the line 21.-21 of Fig. 19;

Fig. 22 is a plan view of a grate element or bar employed in the door portion or primary combustion chamber of the boiler; y

Fig. 23 is an end View of the grate bar Shown in Fig. 22;

Fig. 24 is a side view of shown in Fig. 22;

Fig. 25 is a view in side elevation of a center grate rest;

Fig. 26 is a plan View of the grate rest shown in Fig. 25;

Fig. 27 is a section on the line 27-27 of Fig. 25;

Fig. 28 is a section on the line 28-28 of Fig. 25.;

the grate bar Figf29 is a view in front elevation of a connecting member or coupling for connecting'they grate rest shown in Fig. 25 to the front 'element shown in Fig. 19; f

Fig. 30 is a central vertical section through to forman internal water space, said member the elements shown in Fig. 29.; j

Fig.,31 is an enlarged detail View in .'ront elevation of a closure-member cooperating with an opening inthe jacket toaiord access tothe ends of the 'intermediate boiler sections; l l

Fig. 32 is a section. on the line 32-e32v of Y Fig. 31

Fig. 33 is an enlarged detailjfragmentary view of the upper portion of one of the cen'- ter sections showing a'steam and water separating deviceemployed when the'boiler is operated generally toxgenerate low pressure.

steam; f l Fig. 34 is a Section on the line 347-311 of Fig.v 33, and v Fig. 35 is a section on the line 35e-3'5" oi' Fig. 34.' Y

.Referring to ofreference, 1, 2 designate side sections or walls which in the preferredl embodiment shown are' arranged in parallel vertical planes, and which extend -from front to rear ofthe boiler-'structure when considered in relative arrangement or position with respect to the fuel and ashpit doors to be presently described. Between the side sections 1 and are a plurality ofcenter or intermediate sec-` tions, 3 arrangedinplanes parallel to each' other andtok the said side walls, andwhichy extend from front to rear of the boiler. lCllhe said side 'and center sections combine tofform the side, top and rear walls for a combustion chamber lland anfashpit chamber The front portion ofthe boiler and ofY the comf bustion chamber 4 is closed lby va Yfront sec:

' tion or wallG which is water-backed orwater'- cooled and containsfuel feed or charge'openings 7 and clinlrer clean-.out openings 8;- 4The internal chamberformedbythe side, center and frontY sections just mentioned is divided by a suitablehorizontal grate structurer9 V so as to form the combustion spaceY andl the tioned comprises a hollow member, prefer ably of cast-iron, which isy adapted tohold in part the water'to. be heatedor from which steam is to be generated, and includes a rear vertlcal column orvw'ater legfr 12 whi'chvconstr tutes, 1n* part, the' rear wallof the boiler.

` Each vertical water leg isprovided atk a point adjacent its lower `end'or base'with a huby member v13 having oppositely Vdisposed annu lar flanges 14 formed with inwardly taperingV surfaces 15 to receive tapered coupling nip'- rear water leg of an adjacent section.

the drawings by VcharactersY gh which ashes'lmay ples 16 by which the section is coupled to the At its upper portion the section includes a vertically extending hollow or chambered member 1? ,including vertical spaced walls 18, 18

beingconnected by upper, lower, and inter- .mediate tubulaimeinbers 19,2(),215 respectively with the said rear water leO so that .ya b1 y, the water 'leg and they forwardly extending ing 211', whichY opt-niingsv when-the sections are Vassembled form a transverse outlet flue passage25. The duct or flue 25 discharges into a smolrehood 25*J adapted to be connected by suitable lpiping toV a chimney. The openings ,23, 25 are' separated from each other by oppositevribs orV flanges 26 extending from the watery leg-'along the intermediate tubular kmember and-lengthwise of theside aceot the Yforwardly extending waterlmember 1'?, so

that the hot gases entering` the distributing chamber will How lengthwise.o1E the forwardly lextending member andl then-be reversed toliow rearward and into the transverse outlet flue passage. Each vertical water leg member is providedl with a joint rib or flange 27'y extending lengthwise thereof and continued along the horizontal upper edge portion of the section, so that the side faces of the water-containing members 17 are spacedtfrom each other to form upper and lower gas liow passages 28, 29 connecting the distributing duct with the outlet flue Yduct 25.'

The forwardly extendingY portions constitutedby the water members 17, constitute Vthe ycrown wall of the combustion space or chamber of the boiler7 and-the lower edge po-rtions'ofthe vforwardly projecting mer bers are provided ith lateral flanges or ribs 30, 30, which* when the sections are asser-.n-

led contactthefcorresponding ribs on adjacent sections tol completethe'crown wall of the combustion space vand prevent the gaseous products of combustion from passing directly from the chamber 11 into the lower 'pas sage 29. The lowerl tubularmembers'20V are of less external diameter than the maximum thickness V01:' thesection (see Fig. 18), so that when thesections are assembled these tubular members' will' be spaced from eachother to form llo'w passages, thus permitting gaseous products tromV the-combustin chamber to j flow between thesev tubular members into the distributing duct-23 and lthence forwardly lintoth'e lower gas passage 29; Theiiorward ends of the members 17 extend to a point adjacent the front ot the boiler, and the open ends of the gas passages are closed in a manner to be presently described, so that the torwardly flowing gases will be reversed and caused-to rearwardly through the gas passages 28 to the transverse tlue passage 2:5. 1t will .be noted that in the embodimentshown these intermediate sections extend longit-ndinally from front to lrear oi the boiler and the side ribs on said sections contact latl erally to form the passages between the sections. f

Each ot the center sections just described is provided' with a depending tubular member which lis internally in communication with the interior of the body oi the Section and depends from the forwardly extending portion of the section, preferably in advance of the lower tubular n'ieinbers 2O. rllhese depending tubular members are so'l'ocated and constructed that when the intermediate sections are assembled, said depending= members aline transversely of the boiler to form a transverse baille dividing the chamber above the grate to form the forward mainvcombustion chamber 4 and a rear secondary combustion chamber and outlet passage 31. ln the preferred embodiment the depending baillet'ormingmember on each section comprises a forward hollow member S2 which inclines downwardly and rearwardly to a point above the lire bed on the grate, and a rearward forwardly depending member which is vunited at its lower end to the lower end portion of the forwardly extending member t the point where theiorward baille member 82 and the rearward baille member 33 unite, they communicate with a hollow coupling member 84 having side nipple openings 85 to receive oppositely tapered coupling nipples 86, by means of which the baille members on adj acent sections are connected and sealed to each other.' The baille members 82, 53 and the coupling` member 34 hollow and communicate with each other7 and the upper ends of said baille members communicate respectivel" with the interior of the lower portion ot t c forward member 17 and member 20, so that the water in the boiler is caused to circulate through the baille members and the chamber around the nipple couplings. The balile n'embers 32,33 Vin each section are spaced from each other to form an opening 3?, so that when the intermediate sections are assembled and the bathe structnres are a ranged in alinemcnt, the openings 8.7 jacent sections will register to 'form a transverse air supply duct extending through the baille and transversely of the plane of `the intermediate sections of the boiler.

The forward balile member 82 on ch section, is provided with opposite side ila] s or beads 38 forming continnations ot the flanges 30, said'langes 38 being directed or curved downwardly and rearwardly to a point beneath the nipple couplings heretofore described. Extending rearwardly from the flanges 30 on each section and bounding the upper and rear portion oi the opening 37,

a rib or lla-nge 39 which extends longitudinally oi the rear baille member, and at its lower end merges in an annular rib 40 surrounding the said nipple opening. The annular rib surrounding the nipple opening is joined to a short depending rib 41 which terminates at a point spaced from the lower end portion of the rib 38, the arrangement being such that the balile is provided on opposite sides of each section and between the sections with outlet ducts 42 connnunicating` with the transverse opening or duct 37, and adapted to discharge air 'from said duct 37 at a point adjacent the bottom of the balile. By directing the rib 88 downwardly and rearwardly, as shown in Fig. 11, the said chiots 42 serve to direct the air in streams or jets toward the secondary combustion or outiet chamber 81. lt will also be seen that when the sections are assembled the ribs 38, 39, 40 and 41 on one section contact the corresponding ribs or flanges on an adjacent section to enclose the air duct 37, thus preventing the passage of air therefrom, except through the outlet ducts 42.

Each oit the end sections or walls comprises inner and outer spaced walls 43, 44, united by a marginal wall 45 to form an internal water chamber which forms part oi the water-containing space of the boiler. The outer wall of each side section is substantially dat,A but the inner wall is preferably constructed, as shown in Fig. l2, with a rear Vertical column or leg portion 46 correspondto the vertical water legs 12 on the intermediate sections, and having a longitudinal rib 47 which cooperates with the corresponding bead on the next adjacent intermediate section to close the rear portion of the boiler. The inner wall is also provided at its upper edge vportion with a horizontal rib 48 to contact the corresponding rib 27 on the center section to maintain the side sections spaced from the center section to t'orm the gas passage 28L between the? side section and the center section. rlhe side section is also formed with forwardly extending tubular members 19, 20, 21 corresponding to the members 19, 20, 21 on the center section, and

with a rib member 26 corresponding to the rib 26 on the center section, well as the lower horizontal rib 30 to cooperate with the rib 30cm the adjacentceuter section to complete the cro. Yn wall of the main combustion chamber. rlhe side section is also provided with hollow ribbed baille-forming members 82233EL and a coupling nipple 86a similar to the balde-'forming members 32, 83 on the intermediate section and adapted to cooperate with the latter to complete the transversely extending baille wall. The side section is provided at a point above the baffle or rib 26` with an openiiigf2et which delivers the combustion products from the gas passages 28',

Y29a to the outlet liie or pipe, but there is no opening between thev lower tubular member nu and the intermediate tubular member 21a,

yas is the case with the intermediate sections.

The side wallis provided at a pointin alinement with the opening forming the air duct inthe transverse battle, with an-air supply Yopening 49 which admits a supply of secondary air from a point external of the boilerf to tlietransverse duet37 when the end sections .and intermediate sections are asseinbled.V The end sections may each be formed with a sight opening 50 located in line with the secondary or outlet chamber 3l. The end section is provided with a lower, water-backed n portion 5l which sei-vesto close Vthe sides of the ashpit chamber, andthe inner wall i of the section beneath the' grate is provided with a coupling hub 52having an inwardly tapering Vopening 53 adapted to receive a tapered push nipple 54, by means. of which the end section maybe coupled to thehub 13 at thelower end of thevertical watery leg of the next intermediate section. Y

The forwardly extending member 17 Vof each intermediate section is provided at its upper. portion with a coupling hub 55, andl the end sections are similarly provided, said hubs beingV so arranged asuto aline transversely of the boiler when the sections `are assembled. "Theseqcoupling hubs are provided with surrounding Contact ribs 56 with Y Vinwardly tapering openings 57 to receive 0ptapped-tto receive a screw plug 66 (Fig-8), Y

orto receive a temperature or pressure-oper- Y ated damper regulator 6l, as shown in Fig. 3.

Each of the nipples 58 heretofore described, is provided at its lower portion with an internal lug 62, and seated in the ends of the nipples in each section" (see Figs. 33j and 34), isa steam separating member inthe Vforni of a sleeve 63, the ends of whichv are inserted in the ends of the nipples,and which sleeve is provided on itsnpper side witha longitudinal slot or cutaway portion 64 to permit access of the generated steam to the interior of the sleeve. One end of each sleeve is-provided with a recess .or notch 6 5'which receives the lug 62, wherebyA the sleeve is held against rotation and theV slot 64 maintained in its upperv position. The lugs 62 also .prevent endwise movement of said sleeves. 'lt will beunderstood that when the boiler is assembled,"there is ay sleeve 63 located in each section and extending across Ythe steam space therein, s0 that said sleeves and the connecting nipples 58 forni a steamway extending across all of the intermediate sections of the boiler, and opening atits end into the end sections; It will be noted by reference to Figs. 8, ll and. l2, that theseparating` sleeves are arranged above the water line of the boiler,fand being imperforate or solid on their side and lower portions, prevent water from entering the outlet passage or steamway. Steam, however, ispermitted tofpass over the sleeveand into the steamwav through'theslots 64. These sleeves are preferably employed only when the boiler is used for generating steam, but if the boiler be only used for heating hot water Yfor a hot Vwater heating system, these sleeves may be omit-ted. Y l

Hthin the upper portion of each side and center section above the Vwater line, is a cross baille or diaphragm .17- uniting, and preferablycast integral with the side walls and `extending forwardly from a point beneath the hubs'f55 to a point adjacent the forward ends 'of the battles or ribs 26, 26a. This cross-baille serves to preventY water globules rising to a point where they mightenterthe openings 64 in the sleeves 63, and also causing the steam to flow forward and vthen rearward in the section and during` suoli ,flow deposit entrained water before reaching the said openings l64. rlhis Vbattle. also causes the steam and entrained water to strike the wall of the hollow sleeve whereby the Aentrained water is deflected and returnedy to the body of water in the section. By this means comparatively dry steam enters/.said sleeves and is delivered to the heating system, and the delivery of wet steam is reducedforprevented so that throwing of'water into. the heating system is obviated.k A small balile 17h is `.also cast in the section vin rear of cachot the sleeves,so as to prevent the steam inthe rear portion of the section from lowing directly intorthe sleeve opening 64 but causing the same to be deflected downward against and beneath the wall of the sleeve and then be directed forwardly. Y Y Y y At the forwardends of the intermediate sections the front ends of' the gas passages 28, 29, 281,29a are closed by detachable closure Y plates 65 which are provided on'their vertical side edges with laterally projecting ,pins 66 which are adapted toy be inserted yin bayonet slots 67 castin the side faces of the intermediate sections. The Aplates are applied in position by placing the plates againstthe ends ofthe sections, with the pins 66 entered in the horizontal portions of Vthe bayonet slots,

and said plates may then gravitate or be movedd'ownward so that they are held in place vbyy interengagement of the pins with the vertical front wall of theslots. VThese plates close the yspa-ces between the sections and cause the forwardly flowing gases to travel upward and rearward throughy the spaces between the sections into the flue outfront and rear spaced walls 68, 69united by a marginal wall 70 to form the water-enclosing space. Through these walls are formed the charging vdoor openings 7 to be closed by Vsuitable doors 71 hinged suitably to the front wail of the section. The front section may be also provided wit-h the clinker clean-out openingsS controlled by suitable doors 72 hinged suitably on the section. The section isfheldin place bv means of upper andv lower nipple connections v73, preferably of the double tapered push-nipple type, thenipples being seatedin. correspondingly taperedhubs 7 4 formed in the adjacent vertical portions of Vthe end sections and the marginal walls of the frontsection. Bythese. nipple connectionsthe space within the front section is connected inthe water circulation or containing space of the boiler so that water is circulated through the front section and servesy to keep :thesaine cool. :The frontl section is also supported at its lower portion by bracket lugs 75 secured by bolts 76 passing through sleeves 77 cast in the end sectionsand clamped in place by nuts 78 (see Fig. 19)'.

At its front central portion the front section is provided with a vertical elliptical recess 7 9 closed at its rear upper portion by a wall 80 having bolt'holes 81. ,This recess is adapted to receive a water-cooled grate Y support member 82 consisting of a cored casting, which `when in place in the recess is held in place by bolts83 passing through openings 84 in the'support member, and the holes 81. The inner wall of the grate rest member is provided atits upper portion with a water circulationA opening 85'which registers with kan opening 86 inthe wall 80, and is securedthereto by a taperedlnipple 85a. The lower portion of the inner` wall 5 of the rest is provided with a circulation opening 87 inregister with a through openingSS in the' front section located.. beneath 'said wall 80. Extending longitudinally of the' boiler is a water-cooled hollow center grate rest 89,- provided at one end with a flange 90, by which it is bolted atits rear end, Aas at 9,1-, to one of the intermediate sections, and at its forward end` this grate restv is forn'ied with a tapered; port 92 to receive ay coupling nipple 923 which is also seated in the tapered opening 87 in the support 82. 'The arrangement is such that water may circulate through the horizontalgrate rest 89 to and from the center section and the hol-y low front section. The center grate rest 89 is provided on opposite lsides with lugs or pivots 93, 'and the inner faces of the side sections or walls are provided with corresponding lugs 94, upon which are mounted rocking grate bars 95, the ends of the bars being provided with recesses 96 to receive said lugs. The grate bars are also provided with depending arms 97 having pivots 98 arranged in recesses 99 in reciprocable grate operating bars 100, by means of which the grate bars may be rocked or Jtilted when def sired. As will be noted from Fig. y11 of the drawings, wherein seven grate bars are shown, the forward live bars, or those bars in advance of the secondary combustion chamber 31, are perforated to permit ashes to descend therethrough, 'and primary air for combustion to ascend from the ashpit into the primaryy combustion chamber, but the rear two bars, or those beneath the secondary combustion chamber 31 are imperforate. Preferably, the imperforat'e bars are oper ated by one operating bar 100, and the perforate bars by separate or independent oper;

ating bars 10021, so that the perforate and imperforate bars may be operated independently of each other. The grate operating bars yare extended to the front of the boiler where they may be operated by any well knownV form of operating lever 101 fulcrumed, as at 102, on the platework 10. rlihe platework 10 serves to close the front of the ashpit chamber, and is provided with openings 11 through which access may Vbehad to the ashpit for the purpose of removing ashes. The ashpit openings are closd by doors 103 hinged on the plateworlr.

The outlet from the boiler maybe, if desired, through a coupling 104 arranged on the top of the boiler and communicating through one of the sections with the crosspassage 58a through nipples 58 and sleeves 63 heretofore described, whereby the water or steam may be piped to the heating sys'- tem, or the end with outlet tappings 105 to receive piping A(not shown) leading to the hea-ting system. The return from the heating system may be through a lcoupling 106 communicating with and bol-ted to one'of the water legs of an intermediate section, or may be through tappings 107 at the base ofthe end sections. It will bevundersto'od that the ii'iletpor outlet flow tappings which are not utilized, niay be plugged by suitable screw plugs (not shown). It' will be understood that the outletsand inlets or returns may be used either singly or in such combinations as the'v installation may require; p Onevv of the side sections on a point bei t sections may be provided neath thegrate, is provided withan inlet vvided on one side with a check damper opening 111 controlled by a rocking check damper 112.- The damper regulatorY 6ll heretofore described; is .of well known form, anda'ctsl Y on a lever 113 which is connected by lleX'ible ychain connections 114, '115 tothel draft con*- trol damper4 110` and theV 4check :control damperl112, so as 'to automaticallyy reduce Y the draft 'and openl the check damper when f it is desired-to-lower the rate of combustion, or. toclosesthe check "and openrthe draft damper when itis desired to "increase the rateof combustion. Y VIt will` be vunderstood I -thatpin the case of'a steam generating boiler, an increase of steam pressure above a deter-Y 'mined or desired amount, will cause the ,reg-

ulator tocut ldown the rate of combustion', and a fall ofsteam pressurefbelow the point desired will operatethe dempers to vincrease the `rate of combustion v*The boiler may-be enclos'ledin a suitable Yjacket 116 having cut-out portions or open.

.ings to correspond with .the flow,l openings and passages to and from the sections, vthe i Y' construction of this jacket in Ageneral being immaterial. However, the front acket wall is. preferably provided at its upper portion y'135 `with a transverse opening 117 Permitting access to-.the detachable 'plates 65,. so thata suitable cleaning implementmay be inserted in the gas passages 23, 29 for cleaning purpOSesQThis opening 117 is adapted tobe .closed by a cover member 118 (see Figs. 31

and .32) adapted `tov'be secured in place by Vbolts l19`passing throughopenings therein and'threaded into sockets 120 in the vforward i' vertical portions of the intermediate sections y(see Figs. 4' andv 5).

The end ofduct 25 opposite-to that opening 'end section.V` The opening 108 inthe endvsection opposite to that having'the'damperllO may be closedby aco'ver-plate 108g suitably securedto the jacket."4 Thesidemembers of the yjacket arel also provided with pivoted closure members37aL or plate dampers overlying the ends of the duct'37 andv operable to controlf'the ingr-ess ofair to thesaid ductf Y The s-ide members of the jacket are` also pro- -Y vided withfpivoted closures ."rcontaining sight glassOb' and adapted to close or'y open the peep openings'O inthe side'sections.

Y The'enid and intermediate sections are held inV Y assembled; Vrelation Iby 'tie-rods' 121fpassedv throughv openings k122in'lugs or bosses 1123 9: castintegralwith said `sections and held in into thehood lis closed by a' clean-out, door 259 hinged to a frame 25d bolted, or otherwise secured kto the' outer wall oftheV V.place with .nuts 124l (see Fig. 9) onithe ends of said rods in any suitable manner well known in sectional boiler practice. f

The operation of this boiler 1s as follows:

A bed ofsuitable fuel, such as coal, is charged Y through the door openings 7 into the combustion space n front 'of the baille .structure 132-, 33 and is kindled in any suitable manner.

When the coalhas burned. long enough to become coked, the operatorV pushes the hot incandescent coke rearward so as to close the space between thev lower portion of the baiiie structure and the grate, so that the products of 4combustion will be compelled to flow through this bed. of hot coke before passing into the secondary combustion chamber or outlet passage 31, causing combustible matter carried by the gases to be, to a considerableV extent, consumed by `Contact with the hot coke. During the liring or chargingperiod, when the emission of so-called smoke is at its `maximum, the air-controldoors Y37a may be opened to furnish secondary air to the air supply duct 37, the air being drawn in by therdraft' and through the outlet Yducts or jets 42 Vinto the hot coke and into the gases lpassing beneath the baile, this air, servingY `to cause 1more complete combustion of unburned matter carried' by the gases, and reduce to a minimum the amount of socalled smoke Y emitted from the, boiler. The hot gases fromthe secondarycombustion chamberf31flow upward into contact with the tubular members 20, 20a'and are deflected through they spaces between'the same, passing into they transverse Vdistributing chamber or duct-23.".From the distributing Vchamber 23 the hot .gases pass; forward through the lower gas passages 29,29% impartingv their heat to the walls'of'the sections andheatingthe water therein. The gases flow vforward to the front endsof the sections yand then pass upward around the forward end of the baiies 26 and then rearward to the discharge yduct 25, throughwhich they pass to the outlet hood or pipe 251. It will be understood that the supply of airthroughj the battle is' available at any time whenfdesiredror necessary7 by Vopeningv or Aclosing fthe closure-plates' 37a,

and thatthe amount offsecondary air may be regulated by adjusting theplates to vary the area of theinlet ports to the'cross duct 37 in the bafie.'y dlt will be seen that the gases which rise from the fuel into the dome of the forward or main'V 4combustion chamber, are deflectedfby the'fbaiifle downward vthrough the incandescent coal and coke at the basse of the baiiie, whereby combustible constituents of the gases are subj ected to further combustion, and,further, such gases are subjected KVtot an 'additional supply of air from the baliie, substantially completing thek combustion in the 'space to the rear ofthe batlie.

v'The rear'grate'sections A95a are made imperforate so as to reduce' theprimaryi air VIt will be understood, however, that the imperiorate grate sections may be tilted to dump the coke or ash into the ashpit chamber when desired. Y

.One of the Side sections may be provided with tappings 125 for connection to a water level'gauge glass 126, and with tapping 127 for tri-cocks 128.

The construction and arrangement is adwith a bailleV forming a part which alines transversely of the direction of flow of the gases, the. fines can be calculated so that correct areas will. be provided, irrespective of the number oi sections and the area of the grate Surface, this being accomplished by calculating the iiue area of each section in proper proportion to the grate area of each section.

While l have shown and described my invention as being applicable for generation of steam, it will bel understood that the same not to be limited to such use, but may be employed with facility and advantage tor Yheating water for circulation in a water heating system without in any way departing from the intended scope'of the appended claims. n i ln several oi" the iigures oitl the drawings l have indicated by suitable legend the water line when the boiler is employed for generation ci steam, but it will be understood that when. the boiler is operated for heating 0i water for a water heating system, the sections will be completely filled with water.

Vilhat I claim and desire to secure by Letters Patent oi2 the United States is r- 1. A boiler comprising a grate, a plurality oi" sections arranged side by side, certain of said sections each having a depending water member communicating therewith and terminating at its lower end above the grate, each of said members having a transverse opening, saidv depending water members being arranged sideby side and cooperating to form a depending extending transversely of the normal plane oi said sections and dividing the space above 'the grate into two kchambers arranged one to the rear of theV other, said transverse 'openings alining communicatively to form a duct extending through said baffle, and means at the lower portion of said baille for discharging a combustion supporting gas from said duct.

2. A boiler comprising a grate, a plurality oi sections arranged side by side, certain oi said sections each havin@ a de iendinO water member communicating therewith and terminating at its lower end above the grate, eacn of said ni nbers having a transverse opening, said depending water members being arranged side by side transversely ot the boiler and cooperating to form a baiiie extending transversely oil the normal plane of said sections and dividing the space above the grate into chambers one to the rear oi the other, said transverse openings alining cominnnicatively to torni a duct extending through said baille, and a plurality of ducts ext-ending downward through said baiile and serving to discharge from said duct a combustion-promoting gas at 'the lower portion of said baie.

8. A boiler comprising a grate, a plurality of sections arranged side by side transversely of the boiler, certain oi. said sections each ha ing a depending water member communicating therewith and terminating at its lower end above the grate, said depending water members being arranged side by side and cooperating to Jform a baiile extending transversely of the .normal plane oi said sections and dividing the space above the grate into chambers one to the rear oi the other, and a plurality of ducts extending downward through said baiile and having discharge end portions curved toward the rear oi" the baiile and arranged to discharge a combustion-promoting gas toward said rearward chamber.

A. boiler comprising a grate, a plurality of sections arranged side by side, certain ort said sections each having a depending water member Communicating therewith and terminating at its lower end above the grate, each of said members having a transverse opening said depending water members bein g arranged side by side and cooperating to form a baiile extending transversely of the normal plane oi said sections and dividing the space above the grate into chambers one to the rear of the other, the said transverse` openings alining communicatively to form a duct extending through said baffle, and

flanges on said depending water members and cooperating to form downwardly extending passages communicating with said duct for discharging a combustion-promoting gas from said duct at the lower portion of said baille.

5. A boiler comprising a grate, a plurality of sections arranged side by side, certain of said sections each having a depending water member communicating therewith and terminating at its lower end above the grate, said depending water members being arranged side by side and cooperating to form baille extending transversely the normal plane of said sections and dividing the Vspace above the grate into torwardand rearward chambers, said: sections including members in front of saidbaiiie constituting the crown wall of said forward chamber.

l6. A boiler comprising a grate, a plurality of sections arranged side by side, certain ot' saidsections each having a depending water member communicating therewith and terminating at its lower end above tlie grate,

said depending water members being arranged side by side and cooperating to torni a baille extending transversely of the normal plane of said sections and dividing the; space above thegrate into chambers one to the rear of the other,rsaida sections including meinbers arrangedin contact with'each other vin' front of said baille to form a closed'crown wall for said forwardchamber, and said sections including members spaced apart in rear of said vbaille to provide tor dow otcoinbnstionproducts trom said rearward chamber.

I through said baille and serving to discharge` acombustion promoting at the l'owerporvill) discharge acombustion promoting gasl thev lower portion of the baille, and a closed duct formedr by said'depending water members and supplying the said gas to the first-named ducts. L i

8. -Aboiler comprising a grate, a plurality of sections arrangedside by side, certain 01"' Y said sect-ions each having a depending water member communicating vtherewith and terminating at its `lower end above the grate, said water members being arranged side by side alldcooperating to form a baille extending Y transversely or" .theV normal' plane v or" Hsaidsections and dividing the space above'the grate f into chambersr one to tbe rear of tlieother, a

plurality vof 'ducts extending dowvnward -tion o the battle, and aclosed duct orniedby coacting flanges` on said depending water members and 'supplyingthe said gas tofthe lirst-'named ducts, said closed duct having an y inlet opening through a-wall of the boiler.

V9. A. boiler comprising ai grate, plurality of sections arranged side by side, certain of said sections each having "adepending water member communicating therewith and terminating at itslower end above the grate, said depending water members beingarranged side by side to form a baille extending transversely of tlienormal plane of said sections and dividing the space above the grate into chambers one to the rear of the other,.and water llow connections communicatively con necting the lower end portions I" Vsaid depending waterme'mbers to each other. i

l0.. A'boiler con'iprising a grate, a plurality of sectionsarranged side by side, certain of said sectionseach having .a depending water member communicating therewith and terminating at its lower end above thegrate, said depending water members being arranged side by side and cooperating to form a baille extending transverselyot thenormal plane of said sections and dividing the space above Vthe, grate into chambers one to the rear of the other, and alining iiow nipples 'communica tively connecting thev lowerl end-'portions of said members to eachother. ll. il. boiler. comprising a grate, a plurality of sections arranged side by side, certain or riid sections eaciihaving Y a depending water vi'nember communicating therewith and terminating at itslower end above the'grate, said 'watermeinbers beingY arranged side by side to form a'baiclie extending transversely of the normal Y ilane or" said sections and dividing the` space above the grate into chambers one vto the rear of the other, low connections coniinunicativeiv connecting the lower end portions o'said depeiidingfwater membersto eachother, and a plurality of closed ducts extending downward between Ysaid depending water members and serving to .discharge a combustion promoting gas at the lower portionoiz said baille. v Y

l2. iii boiler comprising a grate,a plurality of sections arrangedside by side, certain of said sections each having a depending water Y member communicating therewith and terminating'at itslower end above the grate, said depending water `members I being arranged side by side and cooperating to'form a baille extending'transversely of the unormal plane of said sections and dividing the space above the grate into chambers one to the rearY of the other, and'y each or said: depending water members having oppositely disposed-.openingsat its lower portion, said openingsbeing in alinement transversely ofthe balde, and said members being sealed to each other about said openings 'to'forniia water' flow passage between said members. Y n' i i3. A boiler comprising a grate, a plurality o-itsections` arranged side `by side, certain ot said sections: each having a depending water member communicating therewith and terminating at its lower endY above the grate, said depending water members being arranged side by side and cooperating to-orinV a baille extending transversely of the normal plane of said-sections and dividing thespace above the grate'into chambers one to the rear ofthe other, each of saiddepending watermembers zlO having oppositely disposed openings at its lower portion, said openings being in alinement transversely of the battle, and said members being sealed to each other about said openings to form a flow passage between said members, and flanges on opposite sides ofieach depending water member and cooperating with an Vvadjacent'water member to `term a closed duct extending downward through the battle and serving to discharge acombustion promoting' gas at the lower portion of the baille.

14. A boiler comprising a grate, a plurality of sections arranged side by side, certain of said sections each having. a depending water vmember communicating therewith and terminating at its lower endV above the grate, said water `members being arranged side by side to -iorm a continuous baille extendingV transversely of the normal plane of said sections anddividing the space above the grate into chambers one to the rear of the other, said 4sections having members arranged in contact with eachother in Jfront oli-said baille to form ajclosed crown wall for said forward chainber, and said sections having members spaced -apart in rear of said battle to provide passages for flow of combustion products from said .rearward chamber,vand said sections being formed to provide llow passages for passing -products of combustion in contact `with said sections above ther said crown wall, said pas- .sages receiving the combustion pro ducts from Vsaid rearward chamber.

l5, A boiler comprising a grate, a. plurality of sections having means enacting to form a 'crown wall structure including water spaces and intervening gas flow spaces, and a baiile ,depending from the crown wall structure and dividing the space above the grate into cham- .bers one to the rear of the other, said baille including a plurality of depending water -members arranged side by side and contact- .ingeach other along` their longitudinal edges .to forml a closed wall extending transversely `ofV the normal planeet said sections, and directing products of'conibustion from the for- "ward Vchamber beneath said rbaille into the rearward chamber.

16. A boiler of the character described comprising a surrounding wall structure and 4`a substantially horizontal grate, applurality of sections arranged side by sideand including horizontal water passage members'located above 'the' grate to form the crown Vwall of a main fuel chamber, each of said sections having av depending water tube member communicating therewith and ex- Itending toward the grate, said depending water tube members coacting to form 4a baille extending transversely of the normal planeY of said sections and located at the rear of the main fuel chamber, and means carried by said depending water tube members forming air passages ydelivering air at the lower portion of said baille. I Y

17 A boilerof the character described comprising a surrounding wall structure and a substantially horizontal grate anda plurality oi sections arranged side by side .and including khorizontal water passage members located over the grate to form the crown wall of a mainffuel chamber, a water tube member depending vfrom and vextending across the full wie th of each of said members and communicating therewith and extending toward the grate, said depending watertubefmembers coacting with each other at their oppositelongitudinal side edges toform-with said crown wall a continuous baiiie having its upper edge portion meeting said crown wall'to close the space between said vbalile and wallfandprevent flow therebetween, said baille extending transversely of the normal plane of saidsections and located .at the rear of the main fuel chamber.

18. A boiler comprising a grate, a plurality of -sectionsarranged side by side, certain of said sections eachfhavin-g depending water members terminating at .their'lower ends above thegrate, said dependingwater members being arranged side by side and cooperating to form awa-ter-backed baille eX- tending transversely of thenormaLpla-ne of said sections and dividing the space'above the grate rinto chambers one to the rear of the other, and said members cooperating to form in said baffle a closed air duct. extending transversely of said grate, and 'outlet means extending downward through said baille and adapted to receive air from said first-named ductand discharge the air at the lower portionofthebalile.

19. A boiler comprising a grate,;side walls, a plurality of intermediate sections, each of which includes an upright member and a forwardly extending member, .the upright members cooperatingto form a rear wallo the boiler, and the forwardly extending members forming the crown wall of ,the boiler, certain of said intermediate sections being provided with depending water members terminating above the grate, 'said de- 1 pending water members cooperating to form a. baille extending transversely of the normal plane ot said sections and dividing the space above the grate into a combustion chamber and an outletl chamber, and portions ofsaid forwardly extending members being-spaced ,from each other to form gas passages communicating with said outlet chamber.

20. boiler comprising `a grate, side walls, a plurality of intermediate sections,

.each of which includes an upright vmember and a forwardly extending member, the upright members cooperating to formv'a yrear wall of the boiler, and the forwardly extending members forming the crown wall of the boiler, certain of said intermediate sections Y fio being provided with depending water meinbers terminating above the grate, said depending water members cooperating to form a baiiie extending transversely of the normal plane of said sections anddividingthe space above the grate into a combustion chamber "and an outlet chamber, portions of said forwardly extending `members being spaced from jeach other to form gas passages com-y municating vwith said outlet chamber, and

` Y V,means forcausing the gases toiiowcircui- `tou'sly through said lgas passages.

21. A. boiler comprising a grate, side Walls,

va plurality of intermediate tubular sections, 'f each of whichfinclud'es an upright member and a forwardly extending member, the upright vmembers .cooperating to form a! rear '.wall of the'boiler, and the forwardly extend-` ing members forming the crown wall of the boiler, cert-ain of said intermediate sections being provided with depending water memers terminating above the grate, said de- Y pending water tube members cooperating tol form a water-backed 'baffle' extending transdividing the .space above the grate into a'coinbustion chamber and an outlet cham- .versely ofthe normal planeof said sections Yber, and said forwardly extending members beingspaced fromv each other to form gas passages" communicating with said c outlet chamber, portions of said forwardlyv extending portions having cooperating flange right member and a forwardly extending member, said 4upright members 'cooperating to form a rearwall of the boiler Vand the forwardlyV extending members cooperating to form the crown wall of the boiler and certain portions of said forwardly .extending inem- .'bers being spaced fromeach other' to'form gas flow passages, rcertain of said intermediv ate rsections' lia-ving depending watermemibers terminating `at their lower ends above the grate, said depending water members co- Operating toY forma baiiie extending'ftrans- -versely of the normal plan-e of said sections and dividing the space above the grate into a vcombustion chamber and arearward outlet chamber, said depending. members enclosing anl air duct extending transversely 'of the boiler and having'outletmeans for delivering f vair from -said" duct, spaced water members l"connectimgfsaid upright' members with said forwardly extending members and adording 'communication between-said outlet chamber fand said gas'iow passages, registering openings in said sectionsabove said spacedwaterV 'niemberstol form a flu-e outlet duct from the gasflow passages yto cause gases from the `rearward loutlet chamber tol flcW fOlWlClly in said gas flow passages and 'theii'rearwardly to said iiue outlet duct.l 23.y In a boiler, a plurality of `water-containing sections constituting a water space and a steam space for the boiler, a tubular steam outlet member in the steam space and having a steam-receiving opening in its upper portion, and an inclined baiiie member in certain ofv said sections above the water line therein and extending vforwardly from said outletmember for preventing direct entrance of steam into said opening and causing the generated steam tok strike against said outlet member whereby entrained water is deflected and returned to the body of water, and the steam is separated and enters said steam-receiving opening. v Y 24.1In a boiler, a plurality of water-con- Vtainin sectionshavin reoisterinoV oneninO's D t? L b in opposite walls thereof, and a removable open-ended tubular member'extendingv at its opposite ends into 'said opeiiings'and bridging the space above the water line in certain ofthe sections and connecting said openings', i.

said tubular member being supported at its opposite ends in said openings and having a steam-receiving opening within its section in the upper portion thereof.

25. In a boiler, a plurality of waterfcontaining sections having registering openings in opposite walls thereof, an open-ended'tubular member bridging the space above'the water line in certain of the sectionsv and connecting'sai'd openings, said tubular member .i

having a steam receiving opening in the upper lportion thereof, and VYbaffling' means in' said space to intercept the flow of steam to said tubular member.

26, In a boiler, a plurality of water-'coiitaining sections having registering openings in the ad]acent walls thereof, tubular members `extending into and supported at their opposite endsin said openings and bridging the space above the vvater'line in said section-sand connecting said openings to form a continuous steam outlet passage extending transversely ofsaid sections, saidmembers having steam-receiving openings within'said sections inthe upper portions thereof.

27. In a boiler, a` plurality of water-containing sections spaced Vfrom each other to provide passages to receive gases from the Ycombustion chamber, said sections having openings in the side walls thereof, nipples in -saidopeningsto connect the space above the water line in said sections, and an open-ended tubular member bridging the space in certain Vof the sections and supported by said nipples,

said tubular-member having a steam-receiv-l ing opening in the upper portion thereof.

`28. In a'boiler, a' pluralityv of water-containinglsections spaced rfrom eachother to ,provide passagesto receive gases from the combustion chamber, said sections havingA registering openings in the side walls thereof,

. nipples in said openings to connect the space Aate sections each including a vertical rear water leg and a forwardly extending hollow member, said hollow members being laterally spaced to provide gas iow passages, upper,

lower and intermediate tubular members connecting the water leg of each intermediate section to said hollow member, and forming upper and lower gas flow cross ducts, and said lower tubular members being spaced to afford communication vbetween said combustion space and said gas flow passages.

301A boiler of the character described comprising intermediate sections and walls enclosing a combustion space, said intermediate sections each including a vertical rear water leg and a forwardly extending hollow member, said hollow members being laterally spaced to provide gas iow passages, upper, lower and intermediate tubular members connecting the water leg of each intermediate section to said hollow member, and forming an upper outlet cross-duct and a lower distributing cross-duct, means to separate said cross-ducts, and said lower tubular members being spaced to afford communication between said combustion space and said distributing cross-duct.

3l. A boiler of the character described comprising intermediate sections and walls enclosing a combustion space, said intermediate sections each including a vertical rear waterleg and a forwardly extending hollow member, said hollow members being laterally spaced to provide gas flow passages, upper, lower and intermediate tubular members connecting the water leg of each intermediate section to said hollow member and forming upper and lower gas flow crossducts, means to separate said cross-ducts, said lower tubular members being spaced to afford communication between said combustion space and said gas flow passages, and each ofsaid intermediate sections being providedy 7ith a depending wat-er tube, said depending water tubes alining with each other to iorm a baffle extending transversely of the normal plane of said sections and dividing the combustion space into a main combustion chamber, and an outlet chamber delivering` hot gases through the spaces between said lower tubular members to said lower cross flow duct.

32. A boiler of the characted described comprising end sections, intermediate sections and a front section enclosing a combustion space, said intermediate sections each including a vertical rear water leg and a forwardly extending hollow horizontal member, said horizontal members being spaced to form gas flow passages, ducts connecting said gas flow passages with said combustion space, said gas flow passages being open at the forward end of the boiler, and upright closure plates closing the forward ends of said gas iiow passages, said closure plates having a pin and bayonet slot connection with said sections.

In testimony whereof I have hereunto subscribed my name.

CHARLES w. BRABBE. 

